Buffing machine



J. N. STACY BUFFING MACHINE Jan., 17, H967 T Sheets-Sheet l Filed March2. 1964 INVENTOR fof/Ar /vf 5796;/

J. N. STACY BUFFING MACHINE Jan. 17, 1967 Filed March 2, 1964 BY @ha@www mgm `1 J. N. STACY BUFFING MACHINE Jan. lm 196'] '7 Sheets-5heet 3Filed March 2, 1964 jan. EZ, 96?

Filed March 2. 1964 .,J. N STACY BUFFING MACHINE IN VE NTOR. 7d/aw /1/.w46? Jan. 17, 1967 J. N. sTAcY 3,298,139

BUFFING MACHINE Filed March 2, 1964 7 Sheets-Sheet 5 K ,ff/G /0 ma, l' AINVENTOR.

- fai/V /r/. 57461/ .34

J. N. sTAcY 3,298,139

BUFFING MACHINE 'T Sheets-Sheet 6 Jam. VK, E67

Filed March 2, 1964 Jan. 17, 1967 J. N. sTAcY 3,298,139

BUFFING MACHINE Filed March 2, 1964 7 Sheets-Sheet '7 .United StatesPaflf O n t 3,298,139` u i t BUFFlNGfMACI-IINE Stacy, Florhan Park, NJ.,assignorfto Stacyl GilordCo.,Linden,'N;J. i v `lFiled MarJZ, 1964, Ser.No.` 348,365 l t WZZClaimsgt (Cl. 51e-95) t i t. 1AThe `presentinvention relates t-oJ buiiing `andnnore parusually a plurality`ofrlayers of` a textile; fabric stitched togethenwhich wipe andrubthesurface to` be` polished. Also, it istthelusualjpractice fortheoperatorQto apply atrcoarseabrasiye compound our` rouge `to` theperiphery of the wheeluwhich abrades` the surface `of thearticle to`make it smooth and/orl color theVpolishedJ-surface. lWhen `acoarseabrasive compoundis required to smoothlthe surface, the bufngi `or`polisl'iing ,operations i are usually accomplished in successive steps,rstgon one wheelhav- `iing the abrasivelcompound ,and then on a secondWheel 11wheel having `a polishing and. coloring `material, such Vastrouge.

IThe` success `of` such i a vmanually `performed bufling operation isdependent upontthe skill of the operator in applying the proper amountof pressurehetween `the of huiiing` articles requires an `operaarticleandwheelrfor `theperiod oftime requiredto proi duce the desired linishand lso `turning the articlefas to `engage all surfaces of the articlewith `the Wheel.` Tlf the operator doesnotl subject all lsnrfacesofvthearticleuto ranniform action ofthe ,bufling wheel, the polish on thearticle against `the buing, `wheelI fori too long"` a period lof`time,lthe, friction `will produce heat to a degree suf- ,cient to changethe ,color` `of the `surface which is known surface will varyfand'` giveanunattractive appearance. On theether hand, if Qtheoperatorkholds `onearea of the in `the art asburn`ing. Furthermore, the `amount ,of l

lpressureand time required to polish thelsurfaced Therefore', there isa" predetermined'amonntef` compound and rouge that should be applied'nto bflingwheels to `produce maximurn polishing in a 'minimum period oftimewith- `ont wastngthe compound or rouge. l `It will be obvious `from"the abolveudiscussionthat` `theproper butingofan farticle` to produce `auniform attractive Yfinishlis an art requiring askilled operator.` Y nLcompoiund Iand rouge applied tofthewheels variestthe lBufllng machines"have heretoforefheen proposedlfor t t mechanically performingfeertainbuliingoperations,` lFor `example,` maehines have heretofore l been`propldsedfor automatically controlling the feed of'the abrasive`cornpound onto the periphery of the Wheel..` l Alsomachines lhave beenprovided with `werk herders whichrarejrotated at a relatively slowfspeedrelative to the `bufling Wheel. `Ii`1"s`ome` of these machines theContact of thehutling `.Wheel `with thel `vi/ofrlnpiece is performedmechanically.

However, these machines have `not replaced manual buufling andtheskilledcraftsman required, nor solved the l l aswa'stcfuluse ofcompoundand rouge, no r 'improving the, rate` at which buiiing`dperations canbefperformed. n `One of the'obje'cts ofthe presentinvention is to provide an improved hui-ling machine `whichmechanicallyperforms the entire hufting operation on an article by merely `Inrshinga slide onwhichthe article i`s`|rnounted`relative to a bui-ringwheel.`

l" Another object is to provide' abutting machine of the typeindicated`fo`r subjectinglan :article to be huffed to the action of a pluralityof bufng Wheels during'a single `problems fof manually performed buingoperations Vsuch 3,298,139 Paiterited Jan. 1 7, 19h67 operationwof the`slideto successively"abradewandtpolish the article.

t Anotherobject is to `providea machine of the typeindicatedtwhichutilizes therotation of the buingwheel -torotate `theworkpiece fromzerosvelocity to a velocity approaching .the t peripheralAvelocity of the` bufling Wheel `during its contact with the wheel. t

MAnothertobjectis toprovide a machine `ofthe `type indicated; forsimultaneously rotatingthe articletand moving `it in two` right angulardirections relative/to abuing wheel, u i t t i t i" t Anotherr object isto` provide la buing machine which utilizeslltheengagement ofthe`article with the` bung wheel to rotate the article relatively to thewheel and `utilizesxthe rotation ofcthe articleto` move ;it1laterally nrelative to thewheelto insure contact of all ,surfaces of 1th@ articlewith fthe `buffing Wheel during` a single pass across the wheel.` n, u tt t Another `Objectis to providela bufling machine which `automatically.feeds the rproper u amount `of'` compound ,and/orarouge `onto the,peripheryofna boiling `wheellduring the movement of an article acrossthe `periphery of thewheel.` k t t ,t `Another,object tolprovide a``machine of the `type indicatedlinwhich` therelativeposition of a bulngWheel and a slide on which the workpiece is mounted maybe adjusted to`compensate for Wear and insure en- .gagernent n of n the article with 3the n wheel.

`Another object `is to` `provide abufng maehinel of the type indicatedinwhichthe relative. adjustment of the position of the bufng wheel andslide automatically adjusts `thedriving `mechanism towmaintain theperipheral speed :of t the wheel `substantially constant. l

u," `Still lanother object `of the invention is to provide `machine ofthe type indicated `whichis of relatively simple and'compactconstruction, economical to `manufacture `andV one which istreliableinoperation in performing its intended functionslk s These andother`bjects will become more apparent from the "following description anddrawings in which :like reference characters denote, like partsthroughout `the several views. `It `is todbe expressly understood,however," that the drawings are for the purpose of illustration "onlyandare not adeinition of the limits of the invention,

reference being had for this `p`1`1`r`p`ose tothe appended claims. L c nn t In the drawings:

FIGURE lisa perspective view ofa machine incorporating `thenovelifeaturesof "the `present invention and shown with the `slide"rocked outwardly with respect to a plurality` `of vertically `spacedbuiing rWheels `to adapt a workpiece tourbe `mounted thereon orV removedtherefrom;

f1 FIGURE"2isfafrontelevetionalview of the machine `rslhowi`ng ther,slide rocked toa buffingposition prior to a fcontrolle'd guided movementacross the periphery Hof, the

wheels;

FIGURE 3f is a setionai Plainview taken' on une 341-3 of FIGURE 2tofshow the drive for rotatingtthe bulling wheel shaftand the adjustingmechanism for bodily moving the shaft relative to thefwork holding chuckand slide on which it is4 mounted;`

.l `I'GURE "`4 is alsectional View of the machine in side elevation"andlshowingthe relationship of the slide and work holding chuck With`respect to the pluralityofbumng wheels `prior to wheels;- y f l n u tFIGURE `5 is a sectional view of the split pulley on the buiing wheelshaft foradjusting the speed of the latterto maintain a .substantiallyconstant peripheral speed of thebuiiing wheels; FIGURE `6jis a`sectional view of an electriccircuit the imovement of the "slidefacrossthe `controlled Iby the work holding slide for intermittently advancingsticks of abrasive compound and rouge toward the respective wheels;

FIGURE 7 is a longitudinal sectional view through the work holding chuckand -showing how the chuck and workpiece mounted thereon are rotated bythe bufng wheel;

FIGURE 8 is a sectional view taken on line 8-8 of FIGURE 7 to show theWorm and wheel operated by the rotating chuck for moving the carriage onwhich it is mounted laterally with respect to the buing Wheel;

`FIGURE 9 is a sectional view taken on line 9-9 of FIGURE 8 to show theworm and wheel connection for driving the crank and the link connectedbetween the slide and carriage for moving the latter and chuck mountedthereon laterally with respect to the bufiing wheel;

FIGURE l is a top plan view of a holder for a stick of abrasive compoundand the operating mechanism for advancing the stick;

FIGURE 11 is a side elevational view of the stick lfeeding mechanism andshowing the oscillating solenoid for turning the feed screw and theconnection between the feed screw and pusher for the stick;

FIGURE 12 is a transverse sectional view taken on line 12-12 of FIGURE10 to show the pusher connected to the feed screw and engaging therearward side of the stick of abrasive compound;

FIGURE 13 is a schematic view showing the relation of the stick ofabrasive compound with respect to the periphery of the buiing wheel asthe latter decreases in size due to wear;

FIGURE 14 is a front view partly broken away of a work holding chuck ofmodified construction for turning a workpiece of irregular shape topresent successive surfaces of the workpiece to the action of the bungwheel at theV same location;

FIGURE l is a transverse sectional view through the lwork holding chuckillustrated in FIGURE 14 and showing the inner casing mounting theworkpiece for movement relative to the outer casing and springs Iformoving the inner casing in one direction;

FIGURE 16 is a sectional view similar to FIGURE 15 taken on line 16-16of FIGURE 14 to show the drive and cam for moving the inner casing toits lower position; and

FIGURE 17 is a sectional view taken on line 17-17 of FIGURE 16 to showthe driving mechanism operated by the rotation of the chuck for turningand moving the workpiece relative to the buing wheel,

Machine in general As shown in FIGURES l to 4, the machine 1 comprises.a frame 2 supporting la casing 3 for confining the dust, grit and metalresulting from a bufiing operation. The casing 3 of the machine has afront wall 4 with an opening 5 therein at the front of a plurality ofbuffing wheels 6 and 7. The bufling wheels may be composed of anysuitable material for wiping the surface it contacts, and preferably7each of the buing wheels 6 and 7 comprises a plurality of layers oftextile fabric sewed together to Iprovide a flexible surface at itsouter periphery. The buing wheels 6 and 7 are mounted in spaced relationon a shaft 8 journaled in a movable bracket 9. Shaft 8 is driven from anelectric motor 10 through a V-belt 11 and pulleys 12 and 13 on the shaftand motor, respectively. In the illustrated embodiment the shaft 8 isshown arranged vertically so that the wheels rotate in horizontalplanes, but it will be understood that the shaft and wheels may bemounted to rotate in other positions within the scope of the presentinvention.

As shown in FIGURE 1 a workpiece W to be buifed is ymounted on a workholder or chuck 15. Chuck 15 is rotatably mounted on a carriage 16,later to be described in detail, and projects forwardly 4from thecarriage through a transverse slot 17 in a .slide 18 at the front of themachine. As shown most clearly in FIGURE 1, slide 18 is mounted forvertical sliding and lateral pivoting movement on the front wall 4 ofthe casing 3. To this end, the opening 5 in the front wall 4 of thecasing has a marginal frame 19 comprising a lower sill 20 and upperlintle 21 with a pivot post 22 extending therebetween at one side of theopening. 'v--The cylindrical pivot post 22 extends through a sleevebearing 23 in one corner of the slide 18 to mount the slide for rockingmovement from the position shown in FIGURE 1 to that shown in FIGURE 3and for vertical sliding movement on the rod from the bottom to the topof the opening 5. e

Extending between the lsill 20 and lintle 21 of the marginal frame 19 atthe opposite side of the opening '5 from the pivot post 22 is a bar 24having a guide plate 25 mounted thereon and extending through a portionof the height of the opening 5. Guide plate 25 is in the form of anangle piece overlying the outside inner corner of the bar 24 to providea vertically extending guide shoulder y26, see FIGURE 3, and the side ofthe slide opposite the sleeve bearing 23 is provided with a laterallyprojecting pin 27 movable under the lower end of the guide plate 25 whenthe slide 18 is swung inwardly for engagement with the verticallyextending shoulder 26. Slide 18 is supported by a counter-Weight 28connected to the top thereof through a flexible cable 29 so that theslide may be easily swung into position to overlie the opening 5 andthen moved vertically with respect to the periphery of the wheels 6 and7. During such a pass of the slide 18, the workpiece W mounted thereonwill sucessively engage the periphery of the wheels 5 and 6 and the pathof movement of the slide is controlled by the engagement of the pin 27with the vertically extending shoulder 26 until the pin is moved abovethe upper end of the guide plate 25.

Mounted on the machine at one side of each of the buing wheels 6 and 7are holders 32 and 33 for sticks of abrasive compound and/or rouge 34and 35, respectively. A box 36 mounted on one side of the machine casing3 contains control components and electric circuit connections forcontrolling the feeding of the sticks of compound and rouge 34 and 35along the holders to contact the ends thereof with the peripheries ofthe wheels. The details of stick holding and feeding mechanism and theelectric circuit and its components for feeding the sticks of compoundand rouge will be later described. Suice it to state at this time thatthe slide 18 constitutes a part of the electric circuit and controls theoperation of the stick feeding mechanism by its vertical movement acrossthe bufting wheels 6 and 7.

The buing machine also includes an adjusting means 37 for adjusting theposition of the driving motor 10 with respect to 4the shaft 8 mountingthe buiiing Wheels 6 and 7 and an adjusting means 38 for adjusting thejournal bracket 9 and shaft 8 mounted therein toward and away from theopening 5 in the front wall 4 of the machine casing 3 to compensate forthe wearing away of the periphery of the bufng wheels 6 and 7. Inaddition, the adjusting means 38 adjust the diameter of the pulley 12 tovary the speed of rotation of the shaft 8 in accordance with thediameter of the buing wheels `6 and 7 to maintain a substantiallyconstant peripheral speed of the wheels contacting the work. Thisadjustment insures uniform buing of the surfaces of the workpiece topolish the workpiece ata maximum rate without burning the workpiece.

In addition to the above features of applicants improved machinedescribed generally above, the arrangement is such that the chuck 15 isrotated from zero velocity by its initial engagementk with the lowerbuing wheel 6 as the slide 18 is moved upwardly across the periphery ofthe wheels to `a velocity approaching the peripheral velocity of thebui-ling wheel which it contacts. As explained later in detail,therotation of the chuck 15 is utilized to move the carriage 16 andchuck projecting therefrom laterally at right angles toy the directheperipheriesofthe wheel.

t f ,a Shaft mounting aud driving means "As shown infdetail in FIGURES 2to 5, the bracket 9 in which the bufling wheel shaft 8"is journaledcomprises a"`rock shaft mounted on thema-chine 4frame 2 at one sidethereof andfhas'lower and upper arms 41 and 42 attached thereto andprojecting' radially therefrom, one

over theother; Rock shaft 40,see` FIGURE 2, `is` journalecl`iiia"foot"`b`e`aring 43 and verticallyspaced bearings 441#` l`an`d45supported on angle iron beams of the frame 2 in" verticallyspatiedrelation above the foot bearing43. nEachjradial arm 41and 42hasua split 'hub 41 and 42" surrounding the rock shaft adjacent bearings44 and 45 and the hubs are clamped to the rocklshaft. The outer endsofthearms 41o` and42 4are connected to eachother by a strut t6l formovement as annif. The outer free end `of the lower arm 41 overlies"`aledge 47 formed by the horizontal ange of anangle iron beam vsection ofthe machine frameZi, seeFIGURES 2`and 3, and mounted on the ledge lin`spacedrelation thereto is a guide plate 48 overlying the endof the arm.Thus, the journaled bracket 9 is movableas a unit -aboutthe axis of therock shaft 40 jas afcenter and the,` position ofthe bracket is adjustedby a screwshaft 49 extending through arthre'aded block-50 onthe strut. Ahand crank 51 is Connected through a universal joint 52 to th'eend ofthescrewshaft 49 for rocking the bracket journal 9 to differentpositions.

Shaft 8 isjjournaled in lower and upperbearings 53 and 54` onthearms v41"and 42 'of the journal `bracket 9 for1 rotation` thereon and movementbodily with the bracket on the'rock shaft `40. Thurs, as the butlingwheels 6` and 7` become worn and their diameter decreases, the position"of the journal"bracket`9 and shaft 8l rotatablil mounted therein may beadjustedby turning the hand crank 51 to "move the peripheryofthefbulilng wheels to a"`po'sition` wherelthey will contact'lthemworkpiece W to be'buffedf" o y As'shown most clearly in FIGURES 3and 4 the driving motor 10"also is mounted on `a movablebracket` frame58 mounted for rocking movement on a `pivot post 59 at one side of theframe.l The backet frame `58 overlies and is supported on horizontalsupporting braces `60 of the frame 2 `forsliding movement relative tothe pivot post. The `bracket frame ihasan` arrn 61, at` the sideopposite the pivot post 59 from which a pivoted block `62 dependingtherefrom.` `The motor 10 is adjustedrelative totheshaft 8 mounting thebufing `wheels `6 and 7 by means of a hand crank 63 connected through ashaft 64 .and universal joint F65 to a screw shaft 66 having threadedengagement with the bloek 62. Thus, by turningtthe handcrank 63thebracke't frame 58 mounting'the motor 10 is rockedaround'the pivotvpost 59 toward and away from the'journal bracket`9 `for theshaft 8.` lo The shaft `8 is"connecte`d to the'motor 10 by the V-belt `11* andpulleys12 and `13 `on the shaft and motorprespectively. l* Pulley 12 isa split pulley `as shown in detail in FIGURE 5"which automatically`varies its effective diameter and the rotational speed of the `shaft 8as the belt is pulled into the pulley. Thus, the speed ofthe pulley 12oand shaft 8 may be varied byshifting the positionof motor 10 relativeto shaft 8`or adjusting the shaft toward and away fromthe motortll)andfront wall 4 of the machine casing. ,The split pulley 12 as shown indetail in FIGURE Srcomprises separate flanges 67 `and `68 havingcooperating conical faces engaged by the V- belt 11. One of the flanges`67 ofthe pulley 12 has an axial sleeve69 `keyed to the `shaft 8 and theotherlange of the pulley 12 keyed to andslides` `on the sleeve 69 of theother flange." A'coilsprihg '70` acts between Vthe flange 68 of thepulley 12`and`a `collar 71 on the `end'of the sleeve 69 to presstheflange 68t`oward theil'ange 671. Thus, the belt 11 engages the conicalfaces of the pulley flanges 67 and 68 adjacentthe*outer"peripherywhenfthe buthng wheels 6 and 7 are of maximumdiameter;` 4However, when wear occurs and the journalbracket 9 and shaft8 mounted 'therein are moved away' from the motor '10 the tension of`thebelt 111i acts to spread the flanges 67 and 68 of the pulley 12against the spring 70"s`o thatthebelt will engage the"`co`nical faces ofthe pulleys at a smaller radius to thereby increase the `speed ofrotationof the shaft` 8." The size of pulley12and tension of `spring70are-designed so' that' the `increaseinspeed ofthe `shaft 8 andbulllngwheels`6 and 7tthereon as theshaft is moved to compensatefor` thet smaller l diameter of lthe ltbufting wheels 6 and 7 maintains fa"substantially constantperiphleral speed of `the bufng "wheels at ythevarious adjusted. positions. In `thesame wayl the position of the `motor10i-may `beadjustedrelativeto-ehaft 8 by turninglthe hand' crank 632toincrease or decrease the `initial tension of the beltand the effectivediameterofthepulleylZ to produce-the desired `rotationalspeedof theshaft18. r f YChile/9tuQuilting o t... As :shown in detail in FIGURES 7.to 9.thechuckw15A is rotatablymounted on a carriage Q16 whicl:1, `in`turnis movable `on the; `slide 18 inadirectiontransverse tothe directionof movement of the slide.; -Rotation ofzthe chuck ltoperates through `adriving (connection between the `carriage 16,and slide` 18-to move thecarriage` and chuckontheslide. L, it i. `Chuck 15is in `the j form of,-a` plate 74, see `FIGURE 7, mounted on a shaft V75 projecting forwardlyfrom the slide 18 through the transverse "slot`17 thereinl` Mounted on`the,` `chuck plate `74 isla mandrel. adaptedv to` `fit the: in.- teriorof the workpiece Wand-having cheek` elements 76 and 77 `for clamping`the workpiece therebetween. Cheek element 76 `is mountediin a recessionthetplate and is of a form to `tit the shape ofthe workpiecefand engagea tlangethereof.` The oppositecheek element77isxgenerally'similarfto thecheek `76 but-made in separatelparts with one part` slidable` withrespectl to the other `and `with guide pins` 78 and spring `79 actingtherebetween to press the movable cheek against-the insideface` of theflange at` theopposite iside ofthe workpiece W` and clamp-,it thereto.`As thenchucklS rotates,` `centrifugal `force` `acts on the movable cheekto increase ythe clamping `force proportional to the speedbof rotationofthe chuck. 1, Thecarriage` 16N comprises spacedplates 8Q and 81,seeFIGURES and 8, attached to a eentral1block82 by means of screws83.Theplates Y3,0and 81have aligned openings with sleeve bearings a,` 80b,81o l andr8l1b mounted thereinand slidable on rods 84 and 85 extendinghorizontally between` anverticalside 86and-apar. allel supporting wall87 in `thesliue.18. l\'1`hus,ythecarriagel is slidable `bodilyeonlthespacerods` 84 and 85 transversely `0f the slide 18 andthe pivot `post22. r n ,r

Chuck shaft 75, seeFIGURE 9,\is journaledk inl bearings88 and` 89pm anopening` in theblock 82`and.hasga worm 90 between thebearings in1Vmeshing engagement witha` worm wheel 91, see FIGURES` Stand 9.` iWormrwheel91 is mounted `fastton` a `transverse shaft `92 journaled in rthesideplates 80 .andi :B1 on thecarriage, 16 and the transverse shaft, inturn, has a worm 93 in` meshing engagementwitha worm wheel94 `on a`crank shaft `95` journaled on the carriage. Crankwarml96is keyed tothecrank shaft 95see-FIGURES `7V and 8 ands hasta T-shaped` slotted groove97. in-the under sidethereoffor a crankpin 98 havinganenlargedfihead99slidable in the slot with the pinfdepending from theslot. Surrounding the pin 98 is a sleeve 100 Iwhichbears against thecrank` arm 96 andanutwllscrewed onto the thread end of thecrank pin`clamps the `assembly of pin and sleeve inadjusted position on thecranld arm` 96. it l A connecting rod 102 extends between the crank pin98 and a pin 103 projecting from the bottom of the slide 18. As shown inFIGURE 8, the sleeve 100 of the crank pin 98 is journaled in one end ofthe connecting rod 102 while a sleeve on the fixed pin 103 is journaledin the opposite end of the rod and the rod is held in position on thepins by washers 104 and 105.

Thus, the initial engagement of the chuck with the lower buing wheel 6,see FIGURE 7, as the slide is moved across the periphery of the wheelsproduces a rotation of the chuck and workpiece thereon. For example, thebuing wheel may be rotating at a speed to produce a peripheral speed of9000 feet per minute for buiing a particular workpiece. The engagementof the wheel with the chuck aod workpiece W then rotates the latter fromZero velocity to a high velocity approaching the peripheral velocity ofthe buing wheel, such as 5000 feet per minute, during its contact withthe wheel. Rotation of the chuck 15 is transmitted through the chuckshaft 75 to rotate the worm 90 thereon, see FIGURES 8 and 9, and wormwheel 91 in meshing engagement therewith to turn the transverse shaft92. The worm 93 on shaft 92 then turns the worm wheel 94 on crank shaft95 to rock the crank arm 96. Rocking movement of the crank arm 96 actingthrough the connecting rod 102 and fixed pin 103 on the slide thenbodily moves the carriage 16 transversely of the direction of movementof the slide. It will be observed, therefore, that the rotary movementof the chuck 15 and workpiece W, the vertical movement of the workpiecewith the slide and the horizontal movement of the workpiece on thecarriage 16 relative to the slide and buing wheels 6 and 7 insuresengagement of all` surfaces of the workpiece by the buffing wheels.

Compound and rouge feeding mechanisms The holders 32 and 33 for thesticks of abrasive compound 34 and 35, respectively, are of identicalform and shown in detail in FIGURES 10 to 13. For purposes ofdescription the holder 32 shown in FIGURES 10 to 13 will be described asthe one for compound 34, but it will be understood that the descriptionapplies equally as well to holder 33 for the stick of rouge 35. Holder32 comprises a hollow and generally rectangular casing supported from aside wall of the machine 1 by a bracket 106, see FIGURE 1, attached tothe front wall 4 of the machine casing 3 and bottom ofthe holder casing.A door 107 is provided in the machine casing 3 at the rear of theholders 32 and 33 to adapt the sticks of compound and rouge to beinserted into the respective holders.

The stick of compound 34 is held against one side 108 -of the holder 32by means of spring pressed plungers 109, -see FIGURE 12, and the -stickis advanced by a pusher 110 at the rear fof the stick. As shown mostclearly in FIG- URES 11 and 12 the pusher 110 extends downwardly througha slot 111 in the top wall 112 of the holder to engage the rearward endof the stick and also extends -upwardly above the top wall. The pusher110 is advanced by a screw shaft 113 having a threaded engagement with atapped hub 114 on the upwardly projecting portion of the pusher. Thetapped hub 114 is split and comprises opposed jaws l115 and 116pivotally mounted on a pin 118 projecting lrearwardly from the upperportion of the pusher. A swinging bolt 119 on one ofthe jaws 116 extendslthrough a slot 120 on the other jaw and the two jaws are clamped toeach other to form the hub by means of a wing nut 121 screwed onto theswinging bolt 119. When a stick of abrasive compound 34 is to beinserted in the holder 32, the wing nut 121 is backed olf the swinging'bolt 11'9 to release the jaws 115 and 116 which are then swun-g awayfrom the threaded shaft 113. The assembly of jaws 115, 116 and pusher110 is moved rearwardly until it aligns with a slot 122 in the top andside walls of the holder. Pusher 110 is swung loutwardly through slot122 lto permit the stick to be inserted. After a stick of .compound 134has been inserted into the holder 32 through its open end, the pusher isswung back through the slot 122 and rnoved forwardly to a position atthe rear of the 'stick and the jaws 115 and 116 swung into clampingengagement with .the threaded shaft 113 by screwing up the wing nut 121on the swin-ging bolt 119.

Threaded shaft 113 is mounted for rotation in bearing brackets 123 and124 on the top wall 112 of the holder 32. An oscillating solenoid 125 isconnected to the forward end of the shaft 113 and is adapted whenenergized to rock the shaft through a predetermined angular increment ofmovement. A ratchet wheel 126 is mounted at the opposite end of thethreaded shaft 113 adjacent the bearing bracket 124 which is engaged bya pawl 127 to prevent a reverse movement of the threaded shaft after ithas been actuated by solenoid 125. The oscillating solenoid 125 andpitch of the threads on the screw shaft 113 may be designed so that eachenergization of the solenoid will advance the pusher 110 in a range offrom .0001 to .0015 inch depending ,upon requirements. Such Imovement ofthe pusher 110, in turn, advances the stick of abrasive compound 34 acorresponding amount. The engagement `of the end of the stick with theperiphery of the wheel 6 causes the compound to 'be removed lfrom theend of the `stick and applied to the periphery of the wheel.

Any suitable control mechanism may be provided for intermittentlyenergizing .the loscillating solenoid 125 to advance the stick ofcompound 34 at the required rate. One lform of electric contr-ol forthis purpose is illustrated in FIGURE 6 of the drawings. Thisarrangement cornprises continuously operating timing switches 130 and131 lfor controlling the feeding of compound and rouge and solenoidoperated relays 132 and 133 connected in series with the switches 130,131 and oscillating solenoids 125 and 125a, respectively. Each timingswitch 130 and 131 may be of the microswitch type and comprises arotating cam 130e and 131a, respectively, each having a plurality oflobes and engaging and operating a movable switch contact 130b and 131b.These cam operators are driven continuously while the machine is inoperation, but a circuit is completed through relay switches 132 and 133to the respective rotating oscillating solenoids 125 and 125a only when.the slide 18 is moved in a path across the periphery of the vbuingWheels `6 and 7. To this end, vertically spaced `switch contacts 134 and135 are provided on the guide plate 25 for the slide and the pin 27 -onthe slide 18 constitutes the 'other contact to complete a circuit toIthe oscillating solenoids 125 and 125m Electric current is suppliedfrom power lines 136 and 137 to the primary winding 138 of atransformer. The secondary w1nding 139 of the transformer is connectedbetween a ground G and a rectifier 140. A branch circuit from therectifier 140 then connects the timing switch 130, relay switch 132 andoscillating solenoid 125 in series. Another branch circuit connects thetiming switch 131, relay switch 133 and oscillating solenoid 125a inseries. In addition, branch circuits connect the :outlet from therectifier 140 with the coils of the relays 132 and 133 and spacedcontacts 134 and 135 closed by movement of slide 18. It will beunderstood that the control circuit may take other forms and that af-ull wave rectifier would be used when Vdirect current polarizedsolenoids 125 and 125a are used.

From the above description it will :be apparent that upon movement ofthe slide 18 to a position overlying the opening 5 in the front wall 4of the ,machine casing 3 and upwardly across the guide plate 25, the pin27 on the slide 18 will engage contact 134 and complete a circuit fromthe rectifier 140 through the coil of relay 132. Closing Iof the relayswitch 132 will complete a circuit from the timing switch 130 to theoscillating solenoid 125. Energization of the oscillating solenoid 125,see FIGURE 10, will rotate the screw shaft 113 to advance the pusher 110and stick of compound 34. Solenoid 125 will continue to be operatedintermittently by the lobes of cam 130a as long as the slide 18 isengaged with the switch contact 134. However, when the slide 18 andworkpiece W thereon have passed by the wheel 6, the pin 27 on .slidedisengages` the switch contact134 to discontinue the advance of `the:stick of compound 34. i Continued upward movement of the slide 8engages the pin 27 withthe switch contact 135 -and energizes the coilofrelay switch `133 andgcompletes a circuit to the oscillating solenoid125a and advances the stick of rouge 35. After the slide 8 has completeda 'pass beyondithe upper wheel 7 the pin 27y -on the slide 18`disengagesthe `switch `contact 135 to discontinue the `feeding of rougeagainst the periphery of the wheel. i i l i t i Mode lof operation r r lTo initiate operation of the buing machine 1 `the slide 18 is swungoutwardly on the pivot post22 to the position illustrated in FIGURE 1, aswitch is closed to initiateoperation of the motor 10 t`o drive thewheel shaft 8 and a circuit is completed to initiate operation `of thecams 130e and 1310 `of "the timing switches 130 and 131, see FIG- URE 6.Forpurposes of description itis assumed that the `buflinglwheels y6 and-7 are relativelynew and have a maximum `diameter and the positioniofthe motor lthas beenadjusted bythe hand lcrank y63 for spreading `thesplitipulley `12 to produce addesired peripheral `speed-of the buingwheels. i i i i t `A workpiece W is then mounted on the chuck 15 bpressing the movable cheek 77 of theiwork mounting mandrel inwardly toengage the i flanges of the workpiece.` The workpiece Wis then releasedand gripped by'the `opposed cheek elements 76 and 77 to attachit i.

tothe chuck for a buiing operation.` i i Slide 18 is then slid`downwardly oni the pivot post 22-until the pin 27 projecting from itsside is located below the guide plate 25 at which time the slide isswung inwardly `and thepinengaged `atthe rearof the vertical shoulder26of the guide plate. Slide 13 is then moved upwardlyto move the workpieceW` vertically across the periphery of the buing wheels 6 and 7.` Duringthe first increment of movement the upper edge of the chuck 15` andworkpiece thereon is engaged with the lower bulng wheel 6 as shown inFIGURE 7 which buffs the workpiece by wiping and rubbing the surfacethereof and transmits motion to rotate theV chuck 15 from zerovelocityto a velocity approaching the peripheral velocity of the wheel.Continued upwardmovernent of the slide 18 causes continued bung of thesurface of the workpiece as it rotates at high speed with respect to theperiphery of the wheel to' buff differentsurfaces of the workpiece inprogressively changing directions. Rotat periphery of thebuftng wheel7.`

tion ofthe chunk 15 and workpiece `W continues until r the' center ofthe workpiece is"located at the `centerof the buingwheel 6 `which"tendsto slow the rotation of the chuck andworkpiece; Continued movementof theslide upwardly produces rotation of the chuck and workpiece W from zeroto a high velocity in the opposite direction `with a buing action in`two other directions of` movement, which further tendsto produce auniformlyl `srnooth andpolished surface. n n

In addition to vertical movement with the slide 18 and rotary movementwith the chuck 15, the workpiecesW, also, is moved in a horizontaldirection at right angles to the vertical movement of the slide. Thisresults from the rotation of the chuck 15, see FIGURES 7 t`o`9`,` whichoperating through the :shaft 75, worm 90 thereon, `worm wheell 91 on layshaft`l92, worm93 on lay shaft `92, i

and worm wheel 94 on crank shaft 95 `rocks the crank arm 916. `Crankarm`96 1acting between the crank `pin 98 and link `102 connected to the pin103p`onslide 18 moves the carriage 16 alongrthefrods` 84 andSS on theslide,` Thus, the workpiece is moved horizontally asfwell as verticallyduring its rotation `to insure buing` of Vall of its surfaces diierentdirections of movement.`

`Asl the upward movement of the slide 18 is continued the chuck`15` andworkpiece W thereon passlacross the peripheryof the secondbuing wheel,7. Buing wheel 6 has a `coarse grinding compound applied thereto for 1UA abrading and polishing the surface of the`wo`rkpiefceW while the upperwheel 7 hasa ne rouge` thereon which produces less abrading and morepolishing.` Infaddition, the rouge `gives the buted surface anattractive `appearance and color. During the movement of the slide `18across the periphery ofthe upper `wheel 7 `the"same func tions, takeplace as described withrespectto ,thel wheel 6." In other words, thewheelf7 rotates 4the"cliuzk,1,5 as it is moved vertically andtherotation ofthe transmitted through `the drive to move therchuckfandworkpiece horizontally to insure Contact of all surfaces of the`workpiece by the periphery of the bungfwheel. After the `slide `18lhasmovedpast thejguideV plate 25 it can bev swung outwardlyto the positionillustrated n' in FIGURE l, the workpiece'W removed Landa ,newwork piecemounted on the "chuck n K n. i

During the .irstincrement` of upwardmovement of the slide 18 in theguide 25,` the pin 27Hon`rthe'sliderengages the contact 134, see` FIGURE6,` to energize the oscillating solenoid `125, .see FIGURE` 1l`,` toturn the `screw shaft 11.3 and advance the pusher and stick of compound34 andthereby `engage its end with the periphery ofthe wheel Referringback `to FIGURE ,6,` each "ti-ine, a lobe of the "cam `,130:1 of thetiming switch`13t) engages the contact1`30b `a circuit iscompletedftothe `oscillating solenoid so that the stick of `compound 34intermittently advancedso `long as the' slide 18` contacts the lowerwheel 6.` `As the "slide 18 continuesiitsfupward movement the pin 27disengages Contact.134m` discontinue feeding of stickof compound 34; andengages the contact in series withthe timing vswitch .131 to inter;mittently operate the oscillating, solenoid 125zto advancethe stick ofrouge 35 and engagel its end with `the During operation of the `machine1, the butlng wheels 6 `and 7 become worn and.` it is then necessary tornove the `wheels towardmthe` slideV 18 to insure engagcmentfof theperiphery of the `wheels withthe surface` ofthe workpiece W. This is`accomplished `by turningthe hand crank l51 `whichtoperatingthrough thescrew/.shaft ,49, rocks the journal bracket 9 `and shaft Stowards thechuck 15, `see FIGURE` 3. Such movement of the journal bracket 9`increasesthe tension ofthe V-belt 11 which spreads` the split pulley 12and reduces its` effective diameter. The tension of the 1spring, `70 fand the slope of the "conical sides of the r pulley `flanges67wand `68are so designed as to increase the speed of the pulley 12 and shaft 8which it drives in `proportiontothe` decrease in diameter of the wheels6 and 7 to maintain a substantially constant peripheral speed of the`wheels.

.i Modified chuck` .t y

. FIGURES 14 to 17 illustrate a chuck of modified con; struction formounting aworkpiece W` of `irregular shape and moving it so `as to`present successive surfaces for contact `by the bung wheels 6 `and 7."Thermodiiied chuck may be used in place of the chuck 1,5 in certaininstances or may be used incombination1 with the chuck 15 by mounting itat the outer end` thereof for movement therewith. Also, chuck 145` andshaft 147 may Ibe mounted on a slide 18 the same as chuck 15, previouslydescribed,` or may be mounted in. some other"way to engage the workpieceW thereonwith a buing wheel;v Chuck 145 comprises an outer casing 146mounted; to rotate on a stationary axial shaft 147. Outer casing "146has a back plate 148 at one end and a front plate 149 at; the oppositeend and the lfront plate `is'provided with an opening `150` in' whichthe workpiece W 1is locatedi Front plate 149 is depressedtfrom theperipheryof the outer casing `146 and atguide shieldi151 is `located onthe front plate 149 within the peripheraliflange `formed thereby.` Guideshield 151 alsohas anopening 152 therein with its front curved surface153.

Slidably mounted in the outer casing 146 is an inner casing 154 having acylindrical wall with a sliding lit in the peripheral wall of the outercasing. Inner casing 154 has a diaphragm 155 with holes 156 throughwhich guide pins 157 extend from the back plate 148 of the outer casing146. Thus, the inner casing 154 is mounted to slide on the guide pins157 of the outer casing 156 and is rotatable therewith. A pair ofsprings 158 and 159 act between the back plate 148 of the outer casing146 and the diaphragm 155 of the inner casing 154 to move the latteroutwardly with respect to the back plate of the outer casing. l Anirregular shaped workpiece W, such as the cigarette case of oval crosssection illustrated in FIGURES 14 and 15, is mounted on a fixture 162having stub shafts 163 and 164 projecting from opposite ends. Stub shaft163 is engaged by a live center 166 at the end of a spline shaft 167journaled in a bearing sleeve 168 projecting inwardly from the top ofthe wall of the inner casing 154. The opposite stub shaft 164 has aconical recess 169 at its axis for engagement by a dead center 170 atthe upper end of a pedestal 171. A spring 173 extends between shoulders174 and 175 on the pedestal 171 and dead center 170 for moving thecenter into engagement with the conical recess, but permitting axialmovement thereof against the 'action of the spring for the insertion andremoval of workpieces W therefrom. Thus, the fixture 162 and centers 166and 170 clamp a workpiece in position on the chuck.

A drive is provided which utilizes the turning movement of the chuck 145to rotate and raise and lower the workpiece W to present successiveareas of its surface to the action of the buing wheel at the same levelland flush with the curved surface 153 `of the guide shield 151. Asshown most clearly in FIGURES 15 to 17, the drive includes a worm 178keyed to the stationary axial shaft 147. A lay shaft 179 is journaled inbearings in the inner casing 154 and has a wo-rm wheel 180 in meshingengagement with the worm 178. Thus, when the chuck 145 rotates aroundthe worm 178, the worm wheel 180 will be turned and turn the shaft 179on which it is mounted. A gear 181 mounted `on shaft 179 meshes with agear 182 on a second lay shaft 183 journaled in the inner casing 154. Apinion 184 fast on the outer end of the lay shaft 183 meshes with anintermediate idler gear 185 which, in turn, meshes with the spline shaft167 to turn the latter and the workpiece W connected between it and thedead center 178. In addition, the lay shaft 183 mounts a cam 186 forengaging a cam follower 187 at the lower end of a bracket 188 having a Tshaped end 189 attached to the front plate 149 of the outer casing 146and underlying the stub shaft 163. Thus, cam 186 engaging the camfollower 187 on the stationary bracket 188 and springs 158 and 159acting between casing sections 146 and 154 raise and lower the innercasing as the workpiece is rotated. Furthermore, the cam 186 has aperipheral contour corresponding to the shape of the workpiece W to bebued so as to raise and lower the inner casing 154 in timed relation tothe rotation of the workpiece W to present successive areas of itssurface flush with the upper surface 153 lof the guide shield 151.

The chuck 145 with a workpiece W mounted thereon presents a surface ofthe workpiece in the opening 152 in the guide shield 151. When a buingwheel contacts the front of the chuck it produces rotation of the chuckand engages the periphery of the buing wheel with the exposed surface ofthe workpiece to buif the surface. Rotation of the chuck 145 around thefixed worm 178 rotates the worm wheel 180 and shaft 179 and throughgears 181 and 182 rotates lay shaft 183. Pinion 184 on lay shaft 183rotates the intermediate gear 185 to rotate spindle 167 and workpiece W.Simultaneously, cam 186 raises and lowers the workpiece W so as topresent successive areas of the surface to be buffed at the same levelin the opening 152 for contact by the bufling wheel.

Summary It will now be observed that the present invention provides animproved bufling machine for mechanically performing the entire bufling`operation on an article when a slide is manually actuated by anunskilled operator in a path across the bufting wheel. It, also, will beobserved that the present invention provides a machine for successivelybutling an article with a coarse abrasive compound and a polishing rougeas the slide is -moved across the periphery of successive bulhng wheels.It also will be observed that the present invention provides a workholding chuck for rotating the article and moving it in two rightangular directions relative to a bung wheel. It also will be observedthat the present invention provides a machine in which the rotation ofthe bufling wheel is used to rotate the article to be bufed and therotation of the article moves it laterally with respect to the buingwheel to insure Contact of all surfaces of the article with the bumngwheel during a single pass across the wheel. It also will be observedthat the buiing machine of the present invention automatically feeds theproper amount of compound and rouge onto the periphery of successivebutiing wheels during a buffing operation. It will be further observedthat the buiiing wheel and slide on which the workpiece is mounted maybe adjusted relative to each other to compensate for wear which, inturn, automatically adjusts the driving mechanism to maintain theperipheral speed of the wheel substantially constant. It Will stillfurther be observed that the present invention provides a buliingmachine which is of relatively simple and compact'in construction,economical to manufacture and one which is reliable in operation toperform its intended functions.

While a single embodiment of a machine incorporating the presentinvention is herein illustrated and described it will be understood thatfurther changes may be made in the construction and arrangement ofelements without departing from the spirit or scope of the presentinvention. Therefore, without limitation in this respect, the inventionis defined by the following claims.

I claim:

1. In a buffing machine, a frame, a shaft mounted to rotate in saidframe and having a bufng wheel mounted thereon for rotation therewith,driving means for rotating the shaft, a stick of abrasive compoundmounted on the frame for movement toward the periphery of the buingwheel to engage it therewith, a rotatable chuck for mounting a workpieceso as to engage the latter with the periphery of the buiiing wheeleccentrically of its axis to rotate the chuck and workpiece relative tothe bufiing wheel, means operated by the rotation of the chuck to movethe workpiece relative to the bufling wheel, means operated by themovement of the chuck relative to the buing wheel for feeding the stickof abrasive toward the bufng wheel at a predetermined rate, adjustingmeans for relatively moving the chuck and bufling wheel to insureengagement ofthe latter with the workpiece as the diameter of the wheeldecreases due to wear, and means operated by the relative movement ofthe chuck and butiing wheel for varying the speed of the shaft tomaintain the peripheral speed of the buffmg wheel substantially constantat varying diameters.

2. In a bufling machine, a frame, a shaft mounted to rotate in saidframe and having a plurality of buing wheels mounted thereon in spacedrelation for rotation therewith, driving means for rotating the shaft, achuck for mounting a workpiece, said chuck being mounted for movementrelative to the butling wheels to engage the peripheries of the butiingwheels successively, a stick of abrasive compound mounted on they framefor movement toward the periphery of one of the buf-ling wheels toengage its end therewith, a stick of rouge mounted on the frame formovement toward the periphery of another buing wheel to engage its endtherewith, means controlled by themovement of the chuck relative to the13 buing wheels for feeding thesticks `of abrasiveand rouge toward `the`respective wheels at al predetermined "rate, means for bodily moving thewheelsrelative to the chuck to insure engagement of the lbufling Wheelswith the work-` piece as the diameter of the wheels decrease deftowear,and means operated by the"relative"movenient of the wheels and "chuckfor varyingl the speed of theshaft to maintain the peripheral speed oflthejbuing wheelssubstantially constant at varying diameters;1 V` a 3.`In` a buing machine, `a traine, `a bearing bracket mounted for movementon said frame, a shaft rotatably mounted in` said bearingbracket"and"h`aving abufling wheel"mountedthereonjfor,rotation""therewith, a split pulley mounted on said shaft and havinga `laterally mov'- able `side' to vary the effectivel diameter of`thepulley, driving means including ap'ulley, a"V-b,elt connecting thepulleys on theldriving meansand shaft, astickof abrasive compoundmountedon the frame for movement bodily toward the peripheryyof the buing wheelto engage its end` therewith; a rotatable workholder mounted forsliding' movementllin4 one `direction lto engage the workpiecethereonvvith the periphery ofthe wheeleccentrically to rotate it and thework holder relativ'efto the rotating bufng wheel, means operated by therotation of the iwork holder to moveit and the workpiece bodily relative`tothe bulling wheel in a` direction transversely of saidonedirecti'on,I means operatedby thermovernent of the work`h`ol`der`relative` tothe bufliingwheel in said one direction forfeedingthe stick,` of` abrasive 'toward the" bulingwheel` with" a predeterminedincrement of movement, means for adjusting the position ofthe bearingbracket toward the workpiece Ato compensate forwear andinsure"engagemen,t`of the wheel Withithe workpiece,

and said meansforadjustingthe"position"ofthe bearing bracket `spreadingthe split"pulley on the* shaft whereby to automatically `increase the"`speed `of rotation of `the shaft and maintain' the peripheral speed of`the bufling wheel substantially constant at varying diameters;

"`4.In a buffing machine, a frame, a bearing bracket mountedfor'movement on said frame, a shaftrotatably mounted insaid bearingbracket `and having `a `butling wheel mounted thereony for rotationtherewith, driving means including a split pulley mounted on saidshaftand having a laterally movable side and a V-belt for engaging a(said pulley at varying tensions `tolvary` the effective diameter of thepulley, a chuck for -mountinga workpiece, said chuck ibeing mountedformovement in a path across the periphery of thebuflingwheelforengagementtherewitn a stick of abrasive compound mountedon4 the frameifor ,a

movementl toward the periphery lof fthe buing lwheel to engage its endtherewith, meansvoperatedfbythe movement of the workholder in saidpathacross the periphery of the builing wheel for intermittently `feedingthestick of abrasive towardthe bufng wheel, means `foradjusting a.

the bearing bracket toward the chuckto insure engagement of the,periphery of the wheel with the workpiece as the diameter of the`wheel`decreases`due to wear, and said means for adjusting the position`of the bearing racket spreading the split pulley `toautomaticallyincrease the speed of rotation of the shaft as the,diameter of the bung wheel decreases to maintain the peripheral speed ofthe `bufiing wheel `substantiallyconstant atvary.- ing diameters.

5. In a buingimachine, a frame, a bearingbracket mounted for movement onsaid frame, a shaft rotatably mounted in said bearing bracket and havinga buffing wheel mounted thereon for rotation therewith, driving meansfor the shaft including a V-belt and a split pulley on the shaft havinga laterally movable side to vary the effective diameter of the pulley, arotatable work holder mounted for sliding movement in a path across theperiphery of the bulnng wheel eccentric to its axis to rotate the workholder and workpiece thereon relative to the butnng wheel, meansoperated by the rotation of the work holder to move it in a second pathat an angle to the first path of movement, means for adjusting theposition ofthe bearing bracket toward the work holder to compensate forwear land insure engagement of the wheelwith the workpiece, and saidmeans for adjusting the position of the bearing bracket actuatingthe'split pulley to vary the'4 speed of rotation ofthe shaftinfacjcordancewithvariations in the diameter'of the buing wheel tomaintaintheperipherahspeed of the bung wheel substantially constant atvarying diameters. i

6r In"`a buingmachine, a` frame,a shaft rotatably mountedun said frameand having ya bufingwheel mounted thereon for `rotation therewith,driving means forirotlating theshaft and bufnng wheel, a rotatable chuckfor mounting a workpiec'e`,`fsaid chuck being mounted' forsliding'movement bodily in "onedirection to engage the workpiece withthe periphery "of thewheel eccentrically to rotate the chuck1`relativeto""therotating buing wheel, means operatedbythe rotatingchuekto move it in another direction angularlyrelated to said one'directionof movement,` a stick ofabrasive compound mounted `on theframe for movementtoward the periphery of thebuiing wheel to engage itsend therewith, and means controlled by Athe movement ofthe chuckrelativeto the hurling wheel in'said one4 direction for feeding thestick of abrasive toward the buing wheelV with apredetermined incrementof movement; i 7. In a buflingmachine, aframe,` a "shaft rotatablymounted in said l frame and having a bufling Wheel mounted thereon ,"fori rotation therewith, driving means yfor "rotatingthe shaft, a slidemounted `on thefrarne for movement parallel"withthe"axis` of theshaft, achuck rotatably mounted on said slide for bodily movement therewith and`for movement relative thereto in a `direction transverse tothedirectionof movement of the slide, said chuck beingso` located on theslide as'to" engage the peripheryof the buiiing`wheel;"eccentrically torotate the chuck and workpiece vmountedthereon relative to the buningwheel, means operatedby the rotation of the chuckto" moveit"tr`ansversely of the `slide,a stick `of abrasive compound mounted forsliding movement on the frame toward the periphery of the bufling wheelVto engage its end therewith, and means controlled by the movement ofthefslide relative `to the buffing wheel for feeding the stick ofabrasive toward the hurting wheel at a predetermined rate.

"SAbuling'rnachine in accordance with claim 7 in Whicha pluralityofbuing wheels are'mounted `on the shaft inspaced relation forrotationtherewith, the stick of abrasive compound cooperating with one of thewheels, a stick" of rouge mounted on the" frame -for movement towardVthe "periphery of the` other buinng wheeltto engage its end therewith,said frame having guides `for mounting the slide for movement in apredetermined path parallel with the axis ofthe shafty'said means forlfeeding the stick ofabrasive comprising `a solenoid for each of thesticksl of componnd and rouge for advancingjits stick apredeterminedincrement of movement for each energization, an `elec`tric` circuithaving separate branches for energizing'the `solenoids, 'and a switch ineach of the branches operated by the slide as it movedrelative to thewheels. t t

9; A` buingmachine in accordance with-claim 8 in whichl the shaft isarranged vertically, the-slide being monntedfor vertical movementparallel with the shaft, andthe chuck" being mountedfor verticalmovement with the slide and horizontal movement on the slide.

10. A butling machine in accordance with claim 9 in which the stick ofabrasive compound is mounted to slide in a channel having a slot in oneside extending longitudinally thereof, a pusher at the rear of the stickfor advancing the stick, a feed screw rotatably mounted on the channeland having threaded engagement with the pusher, and said solenoid beingconnected to rotate the screw through a predetermined `angle for eachactuation.

11. In a bufng machine, a frame, a bearing bracket mounted for movementon the frame, a vertical shaft rotatably mounted in said bearing bracketand having `a buffing wheel mounted thereon for lrotation therewith, aslide mounted for movement relative to the buing wheel, a chuck mountedin the slide for holding a workpiece thereon, driving means for rotatingthe shaft, adjusting means for moving the bearing bracket relative tothe bung wheel to insure engagement of the buing wheel with theworkpiece as the diameter of the wheel decreases due to wear, and meansoperated by the movement of the bracket frame for varying the speed ofrotation of the shaft to maintain the peripheral speed of the buingwheel substantially constant at varying diameters.

12. A buing machine in accordance with claim 11 in which the drivingmeans includes a split pulley on the shaft, a V-belt driving the pulley,and said belt spreading the split pulley as the bearing bracket andshaft are moved toward the slide to compensate for wear.

13. A butiing machine in accordance with claim 11 in which the drivingmeans includes an electric motor, means for mounting the motor formovement relative to the bearing bracket to spread the split pulley andinitially ladjust the speed of the shaft.

14. In a buing machine, `a frame, a shaft rotatably mounted in saidframe and having `a bufling wheel mounted thereon for rotationtherewith, a slide mounted on said frame for sliding movement in onedirection across the periphery of the buing wheel, a work holding chuckrotatably mounted in the slide for engagement by the bung wheel torotate the chuck, and means operated by the rot-ation of the workholding chuck to move it on the slide in a direction transverse to saidone direction of movement yas the slide is moved across the periphery ofthe bufling wheel.

15. A bufng machine in accordance with claim 14 in which the chuck isrotatably mounted in a carriage on the slide, means in the slide formounting the carriage for movement laterally of the slide, a crank onthe carriage, a link connecting the crank and slide, and gearing betweenthe rotatable chuck and crank for rotating the crank and reciprocatingthe carriage on the slide.

16. A buing machine in accordance with claim 14 in which the slide ismounted on a post at one side for sliding and rocking movement, a pinprojecting from the opposite side of the slide, a track on the frame forengagement by the pin to adapt the slide to be moved in a predeterminedpath, and a counterweight connected to the slide whereby to adapt theslide to be moved manually in a predetermined path along one side of theframe relative to the rotating buing wheel.

17. In a buing machine, a frame, a shaft rotatably mounted in said frameand having a bufling wheel mounted thereon for rotation therewith,driving means for rotating the shaft -and buing wheel, a stick of anabrasive compound mounted on said frame for movement bodily toward theperiphery of the bufling wheel to engage its end therewith, a slidemounted on said frame `and having means for mounting a workpiece thereonfor movement in a path across the periphery of the bung wheel, and meanscontrolled by the movement of the slide relative to the buing wheel yforfeeding the stick of abrasive toward the bufling wheel.

18. A buing machine in accordance with claim 17 in which the stickfeeding means comprises a pusher for the stick, means including asolenoid for actuating the pusher, and an electric circuit includingsaid solenoid and -a switch actuated by the slide as it moves in a pathacross the periphery of the buing wheel to energize said solenoid.

19. In a bufng machine, a frame, a shaft mounted to rotate on said frameand having a bung wheel mounted thereon for rotation therewith, drivingmeans for rotating said shaft, a rotatable chuck mounted for engagementby the bung wheel eccentrically of its yaxis to rotate the chuck andworkpiece thereon, means for mounting a workpiece on the chuck yforrotation thereon and movement longitudinally thereof, driving meansoperated by the rotation of the chuck and connected to rotate theworkpiece on the chuck, spring means acting on the workpiece mountingmeans to move it and the workpiece thereon longitudinally of the chuckin one direction, a cam operated by the driving means and connected tomove the workpiece mounting means longitudinally of the chuck in theopposite direction, and said cam having a contour corresponding to thecontour of the surface of the workpiece to be buifed whereby the drivingmeans rotates and moves the workpiece on the chuck as the latter isrotated to present successive surfaces of an irregular shaped workpiece`at the same position for contact by the periphery of the bufling wheel.

2t). A bufing machine in accordance with claim 19 in which the chuckcomprises an outer casing, an inner casing mounted in and slidable alongthe outer casing, said workpiece mounting means being attached to theinner casing for movement therewith, said spring means acting betweenthe inner and outer casings to move the inner casing longitudinally ofthe outer casing, and said cam being mounted on the movable inner casingand acting against a cam `follower on the outer casing for moving theinner casing in the opposite direction.

21. A bufng machine in accordance with claim 19 in which the drivingmeans operated by the rotation of the chuck comprises a stationary wormat the axis of the inner and outer Casin-gs, a lay shaft journaled onthe inner casing to extend transversely of the axis of the worm andhaving a worm wheel thereon for meshing engagement with the worm, a geardriven from the lay shaft and connected to rotate the workpiece on itsmounting means, and said lay shaft being connected to operate the cam tomove the inner casing longitudinally of the outer casing.

22. A bufting machine in accordance with claim 19 in which the means forrotatably mounting the workpiece comprises head and tail stocks on thelongitudinally movable inner casing, a fixture for mounting a workpiece,a live center on the head stock for engaging one side of the xture, anaxially movable dead center on the tail stock for engaging the oppositeend of the xture, and a spring acting on the dead center for yieldinglyholding it in engagement with the fixture and movable axially againstthe action of the spring to release the fixture for removing theworkpiece.

References Cited by the Examiner UNITED STATES PATENTS 5/1910 Gail.

3/1942 Moon 51-263 X

1. IN A BUFFING MACHINE, A FRAME, A SHAFT MOUNTED TO ROTATE IN SAIDFRAME AND HAVING A BUFFING WHEEL MOUNTED THEREON FOR ROTATION THEREWITH,DRIVING MEANS FOR ROTATING THE SHAFT, A STICK OF ABRASIVE COMPOUNDMOUNTED ON THE FRAME FOR MOVEMENT TOWARD THE PERIPHERY OF THE BUFFINGWHEEL TO ENGAGE IT THEREWITH, A ROTATABLE CHUCK FOR MOUNTING A WORKPIECESO AS TO ENGAGE THE LATTER WITH THE PERIPHERY OF THE BUFFING WHEELECCENTRICALLY OF ITS AXIS TO ROTATE THE CHUCK AND WORKPIECE RELATIVE TOTHE BUFFING WHEEL, MEANS OPERATED BY THE ROTATION OF THE CHUCK TO MOVETHE WORKPIECE RELATIVE TO THE BUFFING WHEEL, MEANS OPERATED BY THEMOVEMENT OF THE CHUCK RELATIVE TO THE BUFFING WHEEL FOR FEEDING THESTICK OF ABRASIVE TOWARD THE BUFFING WHEEL AT A PREDETERMINED RATE,ADJUSTING MEANS FOR RELATIVELY MOVING THE CHUCK AND BUFFING WHEEL TOINSURE ENGAGEMENT OF THE LATTER WITH THE WORKPIECE AS THE DIAMETER OFTHE WHEEL DECREASES DUE TO WEAR, AND MEANS OPERATED BY THE RELATIVEMOVEMENT OF THE CHUCK AND BUFFING WHEEL FOR VARYING THE SPEED OF THESHAFT TO MAINTAIN THE PERIPHERAL SPEED OF THE BUFFING WHEELSUBSTANTIALLY CONSTANT AT VARYING DIAMETERS.